You can rest assured to buy customized Stainless Steel Cap M4 Hex Socket Drive Head Shoulder Screw from us. We look forward to cooperating with you, if you want to know more, you can consult us now, we will reply to you in time!

Custom Stainless Steel Cap M4 Hex Socket Drive Head Shoulder Screw

Product：

Self-extrusion tapping screws (threaded rolled tapping screws)

In the early 1950s, fastener engineers began to recognize the potential advantage of tapping screws as "structural" rather than as accessories for carrying light loads. This led to the development of a new type of tapping screw screw threaded rolled tapping screw (extrusion tapping screw). According to the design principle of cold-forged taps, threads and ends are specially designed for this screw so that intermittent, periodic pressure can be applied to the top of the screw thread, rather than to the side of the whole thread, to form a joint internal thread. By concentrating and limiting the forming pressure, the pressing material next to the hole can flow more easily and better fill (squeeze) into the tooth side and bottom of the tapping screw thread. Screw rolled tapping screws (self-extrusion tapping screws) can be screwed into a thicker section because the friction resistance is much lower than that of ordinary tapping screws. At the same time, it has better screw control and fastening torque, and greatly improves the connection strength and overall firmness. The engineering standard for tapping screws stipulates strict control of material selection, heat treatment mechanical properties and working performance.

Production Process